Is my Desire bricked?

Hello everyone, I got my HTC Desire on Monday, it's a superb phone. I love it. Anyway, I connected it to my computer and synced some files using Windows Explorer (disk drive mode). I turned the phone off, unplugged the USB cord and attempted to turn the phone back on. However, when I did, instead of turning on, the phone vibrated seven times. After that, nothing happened. I tried turning the phone back on but to no avail. When I plugged the phone in to charge, no light appeared, orange or green. What the hell just happened? Can I fix my phone without having to return it?